| Piddaji Limited | Hospitality | 2018 |
| Pierre Consulting Limited | Professional & scientific | 2019 |
| Piggieshogroast Limited | Hospitality | 2015 |
| Pikzel Ltd | Information & communication | 2020 |
| Pilates BAE Ltd | Manufacturing | 2026 |
| Pile Consult Limited | Administrative & support | 2016 |
| Piled Solutions Limited | Construction | 2019 |
| Pimlico Fresh Limited | Wholesale & retail | 2009 |
| Pinku Foods Limited | Wholesale & retail | 2025 |
| Pioneer Advisory Services Ltd | Professional & scientific | 2024 |
| Pius Vita Limited | Real estate | 2020 |
| PIXEL9 Design Ltd | Professional & scientific | 2016 |
| Pixelplus Media Ltd | Professional & scientific | 2025 |
| Pixture Ltd | Information & communication | 2022 |
| Pizza Perfecto Limited | Hospitality | 2015 |
| PJ Bashford Limited | Professional & scientific | 2022 |
| PK Decorating and Building Services Ltd | Construction | 2020 |
| PK Flight Catering Equipments Ltd | Manufacturing | 2010 |
| Pkms Engineering Limited | Professional & scientific | 2014 |
| Plamena Computer Media Ltd | Manufacturing | 2023 |
| Plan B Engineering Consulting LLP | | 2020 |
| Planet Spice Restaurant Ltd | Hospitality | 2022 |
| Planning Solutions and Logistics Masters Services Ltd | Administrative & support | 2022 |
| Plastic Handrail Services Ltd | Construction | 2017 |
| Plastic Products Holdings Limited | Professional & scientific | 1990 |
| Plastic Products Limited | Wholesale & retail | 1943 |
| Platinum DRY Cleaners & Tailors Ltd | Administrative & support | 2026 |
| Platinum Tailors Ltd | Other services | 2025 |
| PLATINUM999 Assets UK Limited | Health & social care | 2019 |
| Plum Park Limited | Information & communication | 2012 |
| PM World Ltd | Information & communication | 2017 |
| PM1 Property Ltd | Real estate | 2020 |
| PMC Construction Services Ltd | Construction | 2019 |
| Podiatric Medical Pedicure Limited | Health & social care | 2025 |
| Pointman Leadership UK | Education | 2009 |
| Pokz Hair Studios Ltd | Other services | 2023 |
| Polyglot Radio Ltd | Information & communication | 2022 |
| Ponnu Property Ltd | Real estate | 2024 |
| Poorman Estates Ltd | Real estate | 2018 |
| POP Restaurant Limited | Hospitality | 2015 |
| Popchoir Limited | Arts & recreation | 2008 |
| Posh Clinic Limited | Other services | 2016 |
| Positively Events Limited | Administrative & support | 2006 |
| Potinci Properties Ltd | Real estate | 2025 |
| Pots of FUN Mobile Creche Limited | Administrative & support | 2011 |
| Pours Limited | Hospitality | 2023 |
| Power Outage Solutions Limited | Energy | 2026 |
| Powergate Solutions Limited | Information & communication | 2002 |
| Powertalk (UK) Limited | Education | 2002 |
| Poyraz Group Limited | Real estate | 2023 |
| PP Property Holdings Limited | Real estate | 2001 |
| PPM LDN Ltd | Real estate | 2021 |
| PR Corporate Trustees Limited | Professional & scientific | 2019 |
| Practice Media Limited | Information & communication | 2010 |
| Pradaman Consultancy Ltd | Information & communication | 2021 |
| Prajha Infotech Limited | Information & communication | 2017 |
| Prajha Properties Limited | Real estate | 2021 |
| Prayer Changes Things 24 Ltd | Other services | 2021 |
| Precision Access Locks Ltd | Other services | 2026 |
| Precision Ironmongery Ltd | Wholesale & retail | 2020 |
| Precision Monitoring Services Limited | Construction | 2021 |
| Precision Roofing and Construction Ltd | Construction | 2021 |
| Preeminent Highspec Ltd | Construction | 2021 |
| Preferred Services Ltd | Construction | 2019 |
| Prem Air Engineering Ltd | Construction | 2020 |
| Premier Accounting & Management Services Ltd | Professional & scientific | 2022 |
| Premier Auto Assist Ltd | Transport & logistics | 2024 |
| Premier Care Services Ltd | Health & social care | 2003 |
| Premier Homes RTM Company Limited | Households | 2021 |
| Premier Kitchenworks Limited | Construction | 2015 |
| Prentash Limited | Administrative & support | 2019 |
| Prepen Developments Ltd | Construction | 2011 |
| Pressure Guard Technology Ltd | Manufacturing | 2026 |
| Pressworks Ltd | Hospitality | 2026 |
| Prestige Peformance Wraps & Accessories Ltd | Wholesale & retail | 2025 |
| Prestige Properties Care Ltd | Construction | 2020 |
| Prestige Sports Hire Limited | Arts & recreation | 2024 |
| PRH Estates Ltd | Real estate | 2011 |
| Prime Gear Sports Ltd | Manufacturing | 2025 |
| Prime Plus Essentials Ltd | Wholesale & retail | 2024 |
| Primecrest Global Ltd | Wholesale & retail | 2025 |
| Primehex Consulting Limited | Wholesale & retail | 2025 |
| PRINT360 Limited | Manufacturing | 2011 |
| Priority Risk Limited | Professional & scientific | 2003 |
| Priory Medic Ltd | Wholesale & retail | 2026 |
| Prisha Ltd | Real estate | 2019 |
| Pro Asbestos Removal Ltd | Transport & logistics | 2026 |
| Pro Build Engineering Services Ltd | Construction | 2026 |
| Pro Plus Audio Ltd | Wholesale & retail | 2011 |
| Pro TEC IT (UK) Limited | Information & communication | 2015 |
| Procare Facilities Limited | Manufacturing | 2023 |
| Product Marketing Advisory Ltd | Information & communication | 2025 |
| Production Technology Consultants Limited | Information & communication | 1971 |
| Professional Contract Cleaning Limited | Administrative & support | 2019 |
| Professional Contract Maintenance Limited | Administrative & support | 2020 |
| Programme Controls Ltd | Administrative & support | 2019 |
| Progressive Beauty Ltd | Other services | 2024 |
| Project Advisors Limited | Real estate | 1997 |
| Project Planners Consult Limited | Construction | 2023 |
| PROJECT365. Coaching Ltd | Education | 2024 |